public TextAction PeekOrAdd(TextCursor cursor, TextAction.ActionType type)
{
if (UndoActions.Any() && UndoActions.Peek().Match(cursor, type))
{
return(UndoActions.Peek());
}
else
{
return(Add(cursor, type));
}
}
public TextAction PeekIf(TextCursor cursor, TextAction.ActionType type, Func <TextAction, bool> condition)
{
if (UndoActions.Any() && UndoActions.Peek().Match(cursor, type) && condition(UndoActions.Peek()))
{
return(UndoActions.Peek());
}
else
{
return(Add(cursor, type));
}
}
public TextAction Add(TextCursor cursor, TextAction.ActionType type)
{
TextAction action = new TextAction(cursor, type);
UndoActions.Push(action);
if (RedoActions.Any())
{
RedoActions.Clear();
}
return(action);
}
